<!--------------------------                          顶端            ----------------------------->
         <!-- 下拉框 -->
          <form class="d-none d-sm-inline-block form-inline mr-auto ml-md-3 my-2 my-md-0 mw-100 navbar-search">
            <div class="form-control bg-light border-0 small col-sm-6 col-3 dropdown">
                <button id="selectBingqu" type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
                  病区
                </button>
                <div class="dropdown-menu">
                  <a class="dropdown-item" href="#">神经病一区</a>
                  <a class="dropdown-item" href="#">神经病二区</a>
                  <a class="dropdown-item" href="#">精神科区</a>
                </div>
            </div>
          </form>
          <!-- 下拉框 -->


                      <!-- Nav Item - Search Dropdown (Visible Only XS) -->
            <li class="nav-item dropdown no-arrow d-sm-none">
              <a class="nav-link dropdown-toggle" href="#" id="searchDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                <i class="fas fa-search fa-fw"></i>
              </a>
              <div class="dropdown-menu dropdown-menu-right p-3 shadow animated--grow-in" aria-labelledby="searchDropdown">
                <form class="form-inline mr-auto w-100 navbar-search">
                  <div class="input-group">
                    <input type="text" class="form-control bg-light border-0 small" placeholder="Search for..." aria-label="Search" aria-describedby="basic-addon2">
                    <div class="input-group-append">
                      <button class="btn btn-primary" type="button">
                        <i class="fas fa-search fa-sm"></i>
                      </button>
                    </div>
                  </div>
                </form>
              </div>
            </li>